During a Comic-Con panel today, Epic Games revealed that Fortnite will use the Unreal Engine 4, and that their Minecraft-style building and survival game will be released for PCs in 2013. They offer a few Fortnite screenshots showing off the game's visuals, and word from the show is: "Attendees also received a first look at Fortnite’s building system, which is designed so that players can use scavenged materials to quickly build and renovate structures of varying materials and complexity."